hyper acuity

acuity

[uh-kyoo-i-tee]
noun
sharpness; acuteness; keenness: acuity of vision; acuity of mind.

Origin:
1375–1425; late Middle English acuite < Old French < Medieval Latin, Late Latin acuitās, equivalent to Latin acu(ere) to sharpen or acū(tus) sharpened (see acute) + -itās -ity

hyperacuity, noun
nonacuity, noun
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World English Dictionary
acuity (əˈkjuːɪtɪ)
 
n
1.  keenness or acuteness, esp in vision or thought
2.  the capacity of the eye to see fine detail, measured by determining the finest detail that can just be detected
 
[C15: from Old French, from Latin acūtusacute]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

acuity
1540s, from M.Fr. acuité, from M.L. acuitatem (nom. acuitas) "sharpness," from L. acus "needle," acuere "to sharpen," from PIE base *ak- "rise to a point, be sharp" (see acrid).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

acuity a·cu·i·ty (ə-kyōō'ĭ-tē)
n.
Sharpness, clearness, and distinctness of perception or vision.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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